The study app explains: “Generally, we saw similar symptoms of COVID-19 being reported overall in the app by people who had and hadn’t been vaccinated.
“However, fewer symptoms were reported over a shorter period of time by those who had already had a jab, suggesting that they were falling less seriously ill and getting better more quickly.
“Curiously, we noticed that people who had been vaccinated and then tested positive for COVID-19 were more likely to report sneezing as a symptom compared with those without a jab.”
This comes as Covid cases “creep back up” after weeks of decline.